<HTML>
<BODY BGCOLOR="white">
<PRE>
<FONT color="green">001</FONT>    package com.nokia.midp.example.jsr234.audio3d;<a name="line.1"></a>
<FONT color="green">002</FONT>    <a name="line.2"></a>
<FONT color="green">003</FONT>    import javax.microedition.lcdui.Canvas;<a name="line.3"></a>
<FONT color="green">004</FONT>    import javax.microedition.lcdui.Graphics;<a name="line.4"></a>
<FONT color="green">005</FONT>    /**<a name="line.5"></a>
<FONT color="green">006</FONT>     * Canvas class to display User Interface with the sound Source movement. <a name="line.6"></a>
<FONT color="green">007</FONT>     * UI gives facility to move sound source 3D to see the sound effect using UP,DOWN.LEFT and RIGHT keys.<a name="line.7"></a>
<FONT color="green">008</FONT>     * <a name="line.8"></a>
<FONT color="green">009</FONT>     * @author gothadiy<a name="line.9"></a>
<FONT color="green">010</FONT>     *<a name="line.10"></a>
<FONT color="green">011</FONT>     */<a name="line.11"></a>
<FONT color="green">012</FONT>    public class Audio3DCanvas extends Canvas {<a name="line.12"></a>
<FONT color="green">013</FONT>    <a name="line.13"></a>
<FONT color="green">014</FONT>            public static int MAX_X;<a name="line.14"></a>
<FONT color="green">015</FONT>            public static int MAX_Y;<a name="line.15"></a>
<FONT color="green">016</FONT>    <a name="line.16"></a>
<FONT color="green">017</FONT>            /**Instance of Coordinates class*/<a name="line.17"></a>
<FONT color="green">018</FONT>            Coordinates coordinates;<a name="line.18"></a>
<FONT color="green">019</FONT>    <a name="line.19"></a>
<FONT color="green">020</FONT>            /**Audio3DMIDlet instance for display reference*/<a name="line.20"></a>
<FONT color="green">021</FONT>            Audio3DMIDlet midlet;<a name="line.21"></a>
<FONT color="green">022</FONT>    <a name="line.22"></a>
<FONT color="green">023</FONT>            /**<a name="line.23"></a>
<FONT color="green">024</FONT>             * Constructor to initialize all required coordinates<a name="line.24"></a>
<FONT color="green">025</FONT>             * @param maxValues for movement<a name="line.25"></a>
<FONT color="green">026</FONT>             * @param midlet Audio3DMIDlet instance<a name="line.26"></a>
<FONT color="green">027</FONT>             */<a name="line.27"></a>
<FONT color="green">028</FONT>            public Audio3DCanvas(int maxValues, Audio3DMIDlet midlet) {<a name="line.28"></a>
<FONT color="green">029</FONT>                    setTitle("AMMS Audio 3D");<a name="line.29"></a>
<FONT color="green">030</FONT>                    MAX_X = maxValues - 1;<a name="line.30"></a>
<FONT color="green">031</FONT>                    MAX_Y = (maxValues * getHeight()) / getWidth() - 1;<a name="line.31"></a>
<FONT color="green">032</FONT>    <a name="line.32"></a>
<FONT color="green">033</FONT>                    coordinates = new Coordinates(MAX_X, MAX_Y);<a name="line.33"></a>
<FONT color="green">034</FONT>    <a name="line.34"></a>
<FONT color="green">035</FONT>                    this.midlet = midlet;<a name="line.35"></a>
<FONT color="green">036</FONT>            }<a name="line.36"></a>
<FONT color="green">037</FONT>    <a name="line.37"></a>
<FONT color="green">038</FONT>            /**<a name="line.38"></a>
<FONT color="green">039</FONT>             * Method changes the location of sound source based on the key press.<a name="line.39"></a>
<FONT color="green">040</FONT>             * It also change the effect of LocationControl and DistanceAttenuationControl.<a name="line.40"></a>
<FONT color="green">041</FONT>             * @param key keyCode from the keyPress method<a name="line.41"></a>
<FONT color="green">042</FONT>             * @param controller Audio3DMIDlet instance<a name="line.42"></a>
<FONT color="green">043</FONT>             */<a name="line.43"></a>
<FONT color="green">044</FONT>            public void changeSourceLocation(int key, Audio3DMIDlet controller) {<a name="line.44"></a>
<FONT color="green">045</FONT>    <a name="line.45"></a>
<FONT color="green">046</FONT>                    // Handle Sound source navigation<a name="line.46"></a>
<FONT color="green">047</FONT>                    switch (key) {<a name="line.47"></a>
<FONT color="green">048</FONT>                    case UP:<a name="line.48"></a>
<FONT color="green">049</FONT>                            coordinates.sourceY--;<a name="line.49"></a>
<FONT color="green">050</FONT>                            if (coordinates.sourceY &lt; 0) {<a name="line.50"></a>
<FONT color="green">051</FONT>                                    coordinates.sourceY = 0;<a name="line.51"></a>
<FONT color="green">052</FONT>                            }<a name="line.52"></a>
<FONT color="green">053</FONT>                            break;<a name="line.53"></a>
<FONT color="green">054</FONT>    <a name="line.54"></a>
<FONT color="green">055</FONT>                    case LEFT:<a name="line.55"></a>
<FONT color="green">056</FONT>                            coordinates.sourceX--;<a name="line.56"></a>
<FONT color="green">057</FONT>                            if (coordinates.sourceX &lt; 0) {<a name="line.57"></a>
<FONT color="green">058</FONT>                                    coordinates.sourceX = 0;<a name="line.58"></a>
<FONT color="green">059</FONT>                            }<a name="line.59"></a>
<FONT color="green">060</FONT>                            break;<a name="line.60"></a>
<FONT color="green">061</FONT>    <a name="line.61"></a>
<FONT color="green">062</FONT>                    case DOWN:<a name="line.62"></a>
<FONT color="green">063</FONT>                            coordinates.sourceY++;<a name="line.63"></a>
<FONT color="green">064</FONT>                            if (coordinates.sourceY &gt;= MAX_Y) {<a name="line.64"></a>
<FONT color="green">065</FONT>                                    coordinates.sourceY = MAX_Y;<a name="line.65"></a>
<FONT color="green">066</FONT>                            }<a name="line.66"></a>
<FONT color="green">067</FONT>                            break;<a name="line.67"></a>
<FONT color="green">068</FONT>    <a name="line.68"></a>
<FONT color="green">069</FONT>                    case RIGHT:<a name="line.69"></a>
<FONT color="green">070</FONT>                            coordinates.sourceX++;<a name="line.70"></a>
<FONT color="green">071</FONT>                            if (coordinates.sourceX &gt;= MAX_X) {<a name="line.71"></a>
<FONT color="green">072</FONT>                                    coordinates.sourceX = MAX_X;<a name="line.72"></a>
<FONT color="green">073</FONT>                            }<a name="line.73"></a>
<FONT color="green">074</FONT>                            break;<a name="line.74"></a>
<FONT color="green">075</FONT>                    }<a name="line.75"></a>
<FONT color="green">076</FONT>    <a name="line.76"></a>
<FONT color="green">077</FONT>                    repaint();<a name="line.77"></a>
<FONT color="green">078</FONT>    <a name="line.78"></a>
<FONT color="green">079</FONT>                    // Set Control values<a name="line.79"></a>
<FONT color="green">080</FONT>                    setCartesians(controller);<a name="line.80"></a>
<FONT color="green">081</FONT>    <a name="line.81"></a>
<FONT color="green">082</FONT>            }<a name="line.82"></a>
<FONT color="green">083</FONT>            <a name="line.83"></a>
<FONT color="green">084</FONT>            /**<a name="line.84"></a>
<FONT color="green">085</FONT>             * Method sets LocationControl and DistanceAttenuationControl<a name="line.85"></a>
<FONT color="green">086</FONT>             * @param controller Audio3DMIDlet instance<a name="line.86"></a>
<FONT color="green">087</FONT>             */<a name="line.87"></a>
<FONT color="green">088</FONT>            private void setCartesians(Audio3DMIDlet controller) {<a name="line.88"></a>
<FONT color="green">089</FONT>                    controller.sourceLC.setCartesian(this.coordinates.sourceX<a name="line.89"></a>
<FONT color="green">090</FONT>                                    * controller.locAttr.getLocScale(), controller.locAttr<a name="line.90"></a>
<FONT color="green">091</FONT>                                    .getLocAltitude(), this.coordinates.sourceY<a name="line.91"></a>
<FONT color="green">092</FONT>                                    * controller.locAttr.getLocScale());<a name="line.92"></a>
<FONT color="green">093</FONT>    <a name="line.93"></a>
<FONT color="green">094</FONT>                    controller.specLC.setCartesian(this.coordinates.specX<a name="line.94"></a>
<FONT color="green">095</FONT>                                    * controller.locAttr.getLocScale(), 0, this.coordinates.specY<a name="line.95"></a>
<FONT color="green">096</FONT>                                    * controller.locAttr.getLocScale());<a name="line.96"></a>
<FONT color="green">097</FONT>                    <a name="line.97"></a>
<FONT color="green">098</FONT>                    controller.ctlDistAtt.setParameters(midlet.ctlDistAtt.getMinDistance(),<a name="line.98"></a>
<FONT color="green">099</FONT>                    midlet.ctlDistAtt.getMaxDistance(),<a name="line.99"></a>
<FONT color="green">100</FONT>                    midlet.ctlDistAtt.getMuteAfterMax(),<a name="line.100"></a>
<FONT color="green">101</FONT>                    midlet.ctlDistAtt.getRolloffFactor());<a name="line.101"></a>
<FONT color="green">102</FONT>                    <a name="line.102"></a>
<FONT color="green">103</FONT>            }<a name="line.103"></a>
<FONT color="green">104</FONT>    <a name="line.104"></a>
<FONT color="green">105</FONT>            /**<a name="line.105"></a>
<FONT color="green">106</FONT>             * Displays Audio 3D UI. It contains:&lt;br&gt;<a name="line.106"></a>
<FONT color="green">107</FONT>             * - Draw back ground&lt;br&gt;<a name="line.107"></a>
<FONT color="green">108</FONT>             * - Draw Sound source&lt;br&gt;<a name="line.108"></a>
<FONT color="green">109</FONT>             * - Draw Spectator&lt;br&gt;<a name="line.109"></a>
<FONT color="green">110</FONT>             */<a name="line.110"></a>
<FONT color="green">111</FONT>            protected void paint(Graphics graphics) {<a name="line.111"></a>
<FONT color="green">112</FONT>                    // Draw back ground<a name="line.112"></a>
<FONT color="green">113</FONT>                    graphics.setColor(50, 50, 100);<a name="line.113"></a>
<FONT color="green">114</FONT>                    graphics.fillRect(graphics.getClipX(), graphics.getClipY(), graphics<a name="line.114"></a>
<FONT color="green">115</FONT>                                    .getClipWidth(), graphics.getClipHeight());<a name="line.115"></a>
<FONT color="green">116</FONT>    <a name="line.116"></a>
<FONT color="green">117</FONT>                    // Draw Sound source<a name="line.117"></a>
<FONT color="green">118</FONT>                    graphics.setColor(0, 200, 0);<a name="line.118"></a>
<FONT color="green">119</FONT>                    graphics.fillRect((getWidth() * coordinates.sourceX) / MAX_X,<a name="line.119"></a>
<FONT color="green">120</FONT>                                    (getHeight() * coordinates.sourceY) / MAX_Y,<a name="line.120"></a>
<FONT color="green">121</FONT>                                    getWidth() / MAX_X, getHeight() / MAX_Y);<a name="line.121"></a>
<FONT color="green">122</FONT>    <a name="line.122"></a>
<FONT color="green">123</FONT>                    // Draw Spectator<a name="line.123"></a>
<FONT color="green">124</FONT>                    graphics.setColor(200, 0, 0);<a name="line.124"></a>
<FONT color="green">125</FONT>                    graphics.fillRect((getWidth() * coordinates.specX) / MAX_X,<a name="line.125"></a>
<FONT color="green">126</FONT>                                    (getHeight() * coordinates.specY) / MAX_Y, getWidth() / MAX_X,<a name="line.126"></a>
<FONT color="green">127</FONT>                                    getHeight() / MAX_Y);<a name="line.127"></a>
<FONT color="green">128</FONT>    <a name="line.128"></a>
<FONT color="green">129</FONT>            }<a name="line.129"></a>
<FONT color="green">130</FONT>    <a name="line.130"></a>
<FONT color="green">131</FONT>            /**<a name="line.131"></a>
<FONT color="green">132</FONT>             * identify key pressed and handle it<a name="line.132"></a>
<FONT color="green">133</FONT>             */<a name="line.133"></a>
<FONT color="green">134</FONT>            public void keyPressed(int keyCode) {<a name="line.134"></a>
<FONT color="green">135</FONT>    <a name="line.135"></a>
<FONT color="green">136</FONT>                    int key = getGameAction(keyCode);<a name="line.136"></a>
<FONT color="green">137</FONT>                    changeSourceLocation(key, midlet);<a name="line.137"></a>
<FONT color="green">138</FONT>    <a name="line.138"></a>
<FONT color="green">139</FONT>            }<a name="line.139"></a>
<FONT color="green">140</FONT>    <a name="line.140"></a>
<FONT color="green">141</FONT>    }<a name="line.141"></a>




























































</PRE>
</BODY>
</HTML>
